/*
 * Copyright 2022 CloudWeGo Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package main

import (
	"context"
	"io"

	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
)

func main() {
	h := server.Default(server.WithHostPorts("127.0.0.1:8080"), server.WithStreamBody(true))

	h.POST("/bodyStream", handler)

	h.Spin()
}

func handler(ctx context.Context, c *app.RequestContext) {
	// Acquire body streaming
	bodyStream := c.RequestBodyStream()
	// Read half of body bytes
	p := make([]byte, c.Request.Header.ContentLength()/2)
	r, err := bodyStream.Read(p)
	if err != nil {
		panic(err)
	}
	left, _ := io.ReadAll(bodyStream)
	c.String(consts.StatusOK, "bytes streaming_read: %d\nbytes left: %d\n", r, len(left))
}
